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| Spatial Distribution Characteristics in Grain Size of River Surface Sediments Under the Influence of Reservoirs in the Luanhe River Basin |
| Received:February 02, 2015 |
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| KeyWord:Luanhe River Basin;surface sediment;grain size;spatial distribution;reservoirs |
| Author Name | Affiliation | | LIU Jing-ling | State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China | | BAO Kun | State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China | | LI Yi | State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China | | LANG Si-si | State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China |
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| Abstract: |
| The Luanhe River is located in northern part of the Haihe River Basin, China. It is an important water source for industry and agriculture in Beijing, Tianjin and Hebei Province. The present study is to investigate the influence of reservoirs on the spatial distribution characteristics in grain size of surface sediments in the Luanhe River. Seventy-five surface sediment samples were collected from the Luanhe River and its main tributaries. Sediments grain size parameters，which included average particle size, Sorting coefficient, Skewness, Kurtosis and degree of average particle size，were measured by a laser particle analyze. Results showed that the average particle size of surface sediments in the upstream of the Luanhe River or its tributaries was significant different from that in the downstream, demonstrating an obvious trend in terms of surface sediment grain coarsening from upstream to downstream. Furthermore, the size of reservoirs had positive relationship with the degree to which the average particle size of sediment at upstream was different from that at downstream of reservoirs. Our hypothesis was that the twenty-nine large and medium size reservoirs had tremendous impacts on the distribution characteristics in surface sediment grain sizes in the Luanhe River and its tributaries. This study provided fundamental information on the environmental conservation, ecological restoration, and water management of the Luanhe River Basin. |
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